I’ve managed to get a start on what I want, which is to model a base girt around the perimeter in the right orientation. However, I can’t work out how to place a top girt and then space them equally with a maximum limit of centres. What am I doing wrong? I’ve tried to array the curve and the beam and can’t seem to get it to work.
Your GH definition contains tons of components from Rhino Inside that are not Grasshopper built-in. Only people who have Revit and Rhino Inside properly installed can open and test your files.
I can see that you are placing a beam and that you are modifying its parameters later, but I cannot see anything related to the spacing of the girts in Grasshopper. Could this be related to the first warning? Am I missing some components?
Regarding your question about placing and spacing the top girts, I think it is just a matter of finding the logic to create the curves to draw the beams in Grasshopper, like you would do manually in Revit. However, in the file you sent, I am not sure which view or elements I need to look at to create the spacing of the beams/girts. Could you be more specific with this?